[INFO] cloning repository https://github.com/vijaykm2/RustByExample [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vijaykm2/RustByExample" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvijaykm2%2FRustByExample", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvijaykm2%2FRustByExample'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] a000cf1967a595c64472ed3633febaea7911476d [INFO] checking vijaykm2/RustByExample against try#173780a87744406b7489b28349c0176f14bb3881 for pr-135841 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvijaykm2%2FRustByExample" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/vijaykm2/RustByExample on toolchain 173780a87744406b7489b28349c0176f14bb3881 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/vijaykm2/RustByExample [INFO] finished tweaking git repo https://github.com/vijaykm2/RustByExample [INFO] tweaked toml for git repo https://github.com/vijaykm2/RustByExample written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/vijaykm2/RustByExample already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 3d226b90c0f6d501a12ec23f1dde246dfc94545cf22d92378772f5bca9fa472c [INFO] running `Command { std: "docker" "start" "-a" "3d226b90c0f6d501a12ec23f1dde246dfc94545cf22d92378772f5bca9fa472c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "3d226b90c0f6d501a12ec23f1dde246dfc94545cf22d92378772f5bca9fa472c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3d226b90c0f6d501a12ec23f1dde246dfc94545cf22d92378772f5bca9fa472c", kill_on_drop: false }` [INFO] [stdout] 3d226b90c0f6d501a12ec23f1dde246dfc94545cf22d92378772f5bca9fa472c [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 1e3e4888c6d5b3ab9ae3c3c3d4855dbe73f988984ade99391491650b7c7648df [INFO] running `Command { std: "docker" "start" "-a" "1e3e4888c6d5b3ab9ae3c3c3d4855dbe73f988984ade99391491650b7c7648df", kill_on_drop: false }` [INFO] [stderr] Checking RustByExample v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `crate::ch2::primitives` [INFO] [stdout] --> src/main.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use crate::ch2::primitives; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `crate::custom_types::Status::Poor` [INFO] [stdout] --> src/ch3/custom_types.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | use crate::custom_types::Status::Poor; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `crate::custom_types::Work::Civilian` [INFO] [stdout] --> src/ch3/custom_types.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | use crate::custom_types::Work::Civilian; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `crate::ch2::primitives` [INFO] [stdout] --> src/main.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use crate::ch2::primitives; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `crate::custom_types::Status::Poor` [INFO] [stdout] --> src/ch3/custom_types.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | use crate::custom_types::Status::Poor; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `crate::custom_types::Work::Civilian` [INFO] [stdout] --> src/ch3/custom_types.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | use crate::custom_types::Work::Civilian; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `u64_t` should have an upper camel case name [INFO] [stdout] --> src/ch5/types.rs:60:14 [INFO] [stdout] | [INFO] [stdout] 60 | type u64_t = u64; [INFO] [stdout] | ^^^^^ help: convert the identifier to upper camel case: `U64T` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused label [INFO] [stdout] --> src/ch8/flow_control.rs:39:13 [INFO] [stdout] | [INFO] [stdout] 39 | 'inner: loop { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_labels)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `u64_t` should have an upper camel case name [INFO] [stdout] --> src/ch5/types.rs:60:14 [INFO] [stdout] | [INFO] [stdout] 60 | type u64_t = u64; [INFO] [stdout] | ^^^^^ help: convert the identifier to upper camel case: `U64T` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused label [INFO] [stdout] --> src/ch8/flow_control.rs:39:13 [INFO] [stdout] | [INFO] [stdout] 39 | 'inner: loop { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_labels)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable statement [INFO] [stdout] --> src/ch8/flow_control.rs:43:13 [INFO] [stdout] | [INFO] [stdout] 41 | break 'outer; [INFO] [stdout] | ------------ any code following this expression is unreachable [INFO] [stdout] 42 | } [INFO] [stdout] 43 | println!("This is not reached"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unreachable_code)]` on by default [INFO] [stdout] = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable statement [INFO] [stdout] --> src/ch8/flow_control.rs:43:13 [INFO] [stdout] | [INFO] [stdout] 41 | break 'outer; [INFO] [stdout] | ------------ any code following this expression is unreachable [INFO] [stdout] 42 | } [INFO] [stdout] 43 | println!("This is not reached"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unreachable_code)]` on by default [INFO] [stdout] = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `inferred_type` is assigned to, but never used [INFO] [stdout] --> src/ch2/primitives.rs:10:17 [INFO] [stdout] | [INFO] [stdout] 10 | let mut inferred_type = 123; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: consider using `_inferred_type` instead [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `inferred_type` is never read [INFO] [stdout] --> src/ch2/primitives.rs:11:9 [INFO] [stdout] | [INFO] [stdout] 11 | inferred_type = 123123123123123i64; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `mutable` is assigned to, but never used [INFO] [stdout] --> src/ch2/primitives.rs:12:17 [INFO] [stdout] | [INFO] [stdout] 12 | let mut mutable = 23; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: consider using `_mutable` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `mutable` is never read [INFO] [stdout] --> src/ch2/primitives.rs:13:9 [INFO] [stdout] | [INFO] [stdout] 13 | mutable = 32; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `inferred_type` is assigned to, but never used [INFO] [stdout] --> src/ch2/primitives.rs:10:17 [INFO] [stdout] | [INFO] [stdout] 10 | let mut inferred_type = 123; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: consider using `_inferred_type` instead [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `inferred_type` is never read [INFO] [stdout] --> src/ch2/primitives.rs:11:9 [INFO] [stdout] | [INFO] [stdout] 11 | inferred_type = 123123123123123i64; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `mutable` is assigned to, but never used [INFO] [stdout] --> src/ch2/primitives.rs:12:17 [INFO] [stdout] | [INFO] [stdout] 12 | let mut mutable = 23; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: consider using `_mutable` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `mutable` is never read [INFO] [stdout] --> src/ch2/primitives.rs:13:9 [INFO] [stdout] | [INFO] [stdout] 13 | mutable = 32; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `a_binding` is assigned to, but never used [INFO] [stdout] --> src/ch4/variable_bindings.rs:37:13 [INFO] [stdout] | [INFO] [stdout] 37 | let a_binding; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: consider using `_a_binding` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `a_binding` is never read [INFO] [stdout] --> src/ch4/variable_bindings.rs:40:13 [INFO] [stdout] | [INFO] [stdout] 40 | a_binding = x * x; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `mut_int` [INFO] [stdout] --> src/ch4/variable_bindings.rs:53:17 [INFO] [stdout] | [INFO] [stdout] 53 | let mut_int = mut_int; [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mut_int` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `mut_int` is never read [INFO] [stdout] --> src/ch4/variable_bindings.rs:56:9 [INFO] [stdout] | [INFO] [stdout] 56 | mut_int = 231 [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `a_binding` is assigned to, but never used [INFO] [stdout] --> src/ch4/variable_bindings.rs:37:13 [INFO] [stdout] | [INFO] [stdout] 37 | let a_binding; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: consider using `_a_binding` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `a_binding` is never read [INFO] [stdout] --> src/ch4/variable_bindings.rs:40:13 [INFO] [stdout] | [INFO] [stdout] 40 | a_binding = x * x; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `mut_int` [INFO] [stdout] --> src/ch4/variable_bindings.rs:53:17 [INFO] [stdout] | [INFO] [stdout] 53 | let mut_int = mut_int; [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mut_int` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `mut_int` is never read [INFO] [stdout] --> src/ch4/variable_bindings.rs:56:9 [INFO] [stdout] | [INFO] [stdout] 56 | mut_int = 231 [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `name` and `age` are never read [INFO] [stdout] --> src/ch3/custom_types.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 8 | struct Person<'a> { [INFO] [stdout] | ------ fields in this struct [INFO] [stdout] 9 | name: &'a str, [INFO] [stdout] | ^^^^ [INFO] [stdout] 10 | age: u8, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `name` and `age` are never read [INFO] [stdout] --> src/ch3/custom_types.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 8 | struct Person<'a> { [INFO] [stdout] | ------ fields in this struct [INFO] [stdout] 9 | name: &'a str, [INFO] [stdout] | ^^^^ [INFO] [stdout] 10 | age: u8, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Rich` is never constructed [INFO] [stdout] --> src/ch3/custom_types.rs:73:9 [INFO] [stdout] | [INFO] [stdout] 72 | Status{ [INFO] [stdout] | ------ variant in this enum [INFO] [stdout] 73 | Rich, Poor [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Soldier` is never constructed [INFO] [stdout] --> src/ch3/custom_types.rs:76:19 [INFO] [stdout] | [INFO] [stdout] 75 | enum Work { [INFO] [stdout] | ---- variant in this enum [INFO] [stdout] 76 | Civilian, Soldier [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `value` is never read [INFO] [stdout] --> src/ch6/conversion.rs:10:9 [INFO] [stdout] | [INFO] [stdout] 9 | struct Number { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 10 | value: i32 [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Number` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: multiple variants are never constructed [INFO] [stdout] --> src/ch8/flow_control.rs:130:9 [INFO] [stdout] | [INFO] [stdout] 129 | enum Color { [INFO] [stdout] | ----- variants in this enum [INFO] [stdout] 130 | RED, [INFO] [stdout] | ^^^ [INFO] [stdout] 131 | BLUE, [INFO] [stdout] | ^^^^ [INFO] [stdout] 132 | GREEN, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 133 | RGB(u32, u32, u32), [INFO] [stdout] 134 | HSV(u32, u32, u32), [INFO] [stdout] | ^^^ [INFO] [stdout] 135 | HSL(u32, u32, u32), [INFO] [stdout] | ^^^ [INFO] [stdout] 136 | CMY(u32, u32, u32), [INFO] [stdout] | ^^^ [INFO] [stdout] 137 | CMYK(u32, u32, u32, u32), [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused arithmetic operation that must be used [INFO] [stdout] --> src/ch7/expressions.rs:9:19 [INFO] [stdout] | [INFO] [stdout] 9 | let z = { 2 * x; }; [INFO] [stdout] | ^^^^^ the arithmetic operation produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 9 | let z = { let _ = 2 * x; }; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Rich` is never constructed [INFO] [stdout] --> src/ch3/custom_types.rs:73:9 [INFO] [stdout] | [INFO] [stdout] 72 | Status{ [INFO] [stdout] | ------ variant in this enum [INFO] [stdout] 73 | Rich, Poor [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Soldier` is never constructed [INFO] [stdout] --> src/ch3/custom_types.rs:76:19 [INFO] [stdout] | [INFO] [stdout] 75 | enum Work { [INFO] [stdout] | ---- variant in this enum [INFO] [stdout] 76 | Civilian, Soldier [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `value` is never read [INFO] [stdout] --> src/ch6/conversion.rs:10:9 [INFO] [stdout] | [INFO] [stdout] 9 | struct Number { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 10 | value: i32 [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Number` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: multiple variants are never constructed [INFO] [stdout] --> src/ch8/flow_control.rs:130:9 [INFO] [stdout] | [INFO] [stdout] 129 | enum Color { [INFO] [stdout] | ----- variants in this enum [INFO] [stdout] 130 | RED, [INFO] [stdout] | ^^^ [INFO] [stdout] 131 | BLUE, [INFO] [stdout] | ^^^^ [INFO] [stdout] 132 | GREEN, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 133 | RGB(u32, u32, u32), [INFO] [stdout] 134 | HSV(u32, u32, u32), [INFO] [stdout] | ^^^ [INFO] [stdout] 135 | HSL(u32, u32, u32), [INFO] [stdout] | ^^^ [INFO] [stdout] 136 | CMY(u32, u32, u32), [INFO] [stdout] | ^^^ [INFO] [stdout] 137 | CMYK(u32, u32, u32, u32), [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused arithmetic operation that must be used [INFO] [stdout] --> src/ch7/expressions.rs:9:19 [INFO] [stdout] | [INFO] [stdout] 9 | let z = { 2 * x; }; [INFO] [stdout] | ^^^^^ the arithmetic operation produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 9 | let z = { let _ = 2 * x; }; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s [INFO] running `Command { std: "docker" "inspect" "1e3e4888c6d5b3ab9ae3c3c3d4855dbe73f988984ade99391491650b7c7648df", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1e3e4888c6d5b3ab9ae3c3c3d4855dbe73f988984ade99391491650b7c7648df", kill_on_drop: false }` [INFO] [stdout] 1e3e4888c6d5b3ab9ae3c3c3d4855dbe73f988984ade99391491650b7c7648df